[README] Also note ranges property in comment objects
[README] Also note ranges property in comment objects

marijnh/acorn,MarcelGerber/acorn,ternjs/acorn,TimothyGu/acorn,Rich-Harris/acorn,mysticatea/acorn,mathiasbynens/acorn,happibum/acorn,happibum/acorn,mysticatea/acorn,mathiasbynens/acorn,ternjs/acorn,TimothyGu/acorn,Rich-Harris/acorn,marijnh/acorn,mysticatea/acorn,ajaxorg/acorn,marijnh/acorn,Rich-Harris/acorn,TimothyGu/acorn,mathiasbynens/acorn,btmills/acorn,happibum/acorn,btmills/acorn,ajaxorg/acorn,MarcelGerber/acorn,ternjs/acorn,MarcelGerber/acorn,btmills/acorn,ajaxorg/acorn